How many times are the loops, defined by the following statements,
executed:

a) DO I = 2, N/2, 3
    with N having the value 2.

Answer: 0.

b) DO I = 1, N, 4
    with N having the value 2.

Answer: 1.

c) DO I = 3, N**2, 5
    with N having the value 2.

Answer: 1.

d) DO I = 2, N/2, 3
    with N having the value 15.

Answer: 2.

e) DO I = 1, N, 4
    with N having the value 15.

Answer: 4.

f) DO I = 3, N**2, 5
    with N having the value 15.

Answer: 45.